Fix language spinners in translate infobar.

Fix language spinners in translate infobar.

These spinners were no longer clickable as a side-effect of this CL
(https://codereview.chromium.org/657893005) which make the TextViews
inside the spinners clickable. As a result, the Spinner never received
click events.

Also, the spinner dropdown arrow was missing on pre-L devices because we
were creating the Spinner using "new Spinner()" instead of inflating it
from a resource. This is a no-no when using the AppCompat theme.

BUG=435491
Committed: https://crrev.com/40fe0302f88370217badc36e8a652d2b5543b631
Cr-Commit-Position: refs/heads/master@{#306522}

[newt (away), 2014-12-03 00:49:29]

newt@chromium.org changed reviewers:
+ tedchoc@chromium.org

[newt (away), 2014-12-03 00:49:29]

PTAL

[Ted C, 2014-12-03 00:54:47]

lgtm

[newt (away), 2014-12-03 01:02:15]

The CQ bit was checked by newt@chromium.org

[commit-bot: I haz the power, 2014-12-03 01:03:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/778533002/1

[commit-bot: I haz the power, 2014-12-03 01:49:17]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-12-03 01:50:08]

Patchset 1 (id:??) landed as
https://crrev.com/40fe0302f88370217badc36e8a652d2b5543b631
Cr-Commit-Position: refs/heads/master@{#306522}